4 research outputs found
Metal-Coordination-Induced Fusion Creates Hollow Crystalline Molecular Superstructures
In this work, we
report the formation of superstructures assembled
from organic tubular crystals mediated by metal-coordination chemistry.
This template-free process involves the crystallization of molecules
into crystals having a rectangular and uniform morphology, which then
go on to fuse together into multibranched superstructures. The initially
hollow and organic crystals are obtained under solvothermal conditions
in the presence of a copper salt, whereas the superstructures are
subsequently formed by aging the reaction mixture at room temperature.
The mild thermodynamic conditions and the favorable kinetics of this
unique self-assembly process allowed us to <i>ex-situ</i> monitor the superstructure formation by electron microscopy, highlighting
a pivotal and unusual role for copper ions in their formation and
stabilization
Metal-Coordination-Induced Fusion Creates Hollow Crystalline Molecular Superstructures
In this work, we
report the formation of superstructures assembled
from organic tubular crystals mediated by metal-coordination chemistry.
This template-free process involves the crystallization of molecules
into crystals having a rectangular and uniform morphology, which then
go on to fuse together into multibranched superstructures. The initially
hollow and organic crystals are obtained under solvothermal conditions
in the presence of a copper salt, whereas the superstructures are
subsequently formed by aging the reaction mixture at room temperature.
The mild thermodynamic conditions and the favorable kinetics of this
unique self-assembly process allowed us to <i>ex-situ</i> monitor the superstructure formation by electron microscopy, highlighting
a pivotal and unusual role for copper ions in their formation and
stabilization
Metallic Nanocrystal Ripening on Inorganic Surfaces
In
this paper, we demonstrate the formation of hybrid nanostructures
consisting of two distinctive components mainly in a one-to-one ratio.
Thermolysis of inorganic nanotubes (INT) and closed-cage, inorganic
fullerene-like (IF) nanoparticles decorated with a dense coating of
metallic nanoparticles (M = Au, Ag, Pd) results in migration of relatively
small NPs or surface-enhanced diffusion of atoms or clusters, generating
larger particles (ripening). AuNP growth on the surface of INTs has
been captured in real time using in situ electron microscopy measurements.
Reaction of the AuNP-decorated INTs with an alkylthiol results in
a chemically induced NP fusion process at room temperature. The NPs
do not dissociate from the surfaces of the INTs and IFs, but for proximate
IFs we observed fusion between AuNPs originating from different IFs
Metallic Nanocrystal Ripening on Inorganic Surfaces
In
this paper, we demonstrate the formation of hybrid nanostructures
consisting of two distinctive components mainly in a one-to-one ratio.
Thermolysis of inorganic nanotubes (INT) and closed-cage, inorganic
fullerene-like (IF) nanoparticles decorated with a dense coating of
metallic nanoparticles (M = Au, Ag, Pd) results in migration of relatively
small NPs or surface-enhanced diffusion of atoms or clusters, generating
larger particles (ripening). AuNP growth on the surface of INTs has
been captured in real time using in situ electron microscopy measurements.
Reaction of the AuNP-decorated INTs with an alkylthiol results in
a chemically induced NP fusion process at room temperature. The NPs
do not dissociate from the surfaces of the INTs and IFs, but for proximate
IFs we observed fusion between AuNPs originating from different IFs